Mishimoto Baffled Oil Catch Can — F8X M3/M4/M2 Competition

The core of the system is Mishimoto's patent-pending 2-port compact baffled can, machined from billet 6061 aluminum and sealed with Viton O-rings rated for long-term resistance to oil and heat. Inside, a 50-micron bronze filter works alongside a dedicated internal baffle to strip oil mist from crankcase vapors with real efficiency — keeping that contamination out of your intake tract, off your intercooler surfaces, and away from the octane-sensitive combustion environment the S55 depends on. The CNC-machined lid features inlet and outlet ports dimensioned to match the inner bore of the OEM CCV hose, eliminating flow restrictions that generic catch cans introduce.

Installation is designed to be straightforward: pre-molded hoses are included so there's no trimming or custom routing required, and the dedicated CNC-machined bracket mounts directly to existing points in the engine bay. Most owners complete the job in under 30 minutes without specialist tools. The bracket itself is available in 12 BMW-specific color-matched anodized finishes — or classic black — so the finished result looks intentional rather than improvised.

For a high-mileage street car or a track build you intend to hold onto, this is one of the more cost-effective ways to protect the S55's intake system from the slow, invisible damage that direct injection makes inevitable. The materials, fitment precision, and filtration spec put this well above entry-level catch can options on the market.